Home / 129,311-200,690

Finding the Third Proportional to 129,311 and 200,690

Calculator

Solution

The third proportional to 129,311 and 200,690 is: 311,469.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,311 : 200,690 = 200,690 : x
  2. Step 2: Convert to fraction form
    129,311/200,690 = 200,690/x
  3. Step 3: Cross multiply
    129,311x = 200,690 × 200,690
  4. Step 4: Simplify right side
    129,311x = 40,276,476,100
  5. Step 5: Solve for x
    x = 40,276,476,100/129,311
  6. Step 6: Final answer
    x = 311,469.84

Related Problems

Find third proportional to 64,655.50 and 100,345
Half scale
Find third proportional to 258,622 and 401,380
Double scale
Find third proportional to 129,313 and 200,693
Similar ratio
Find third proportional to 193,966.50 and 301,035
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.